[fish shell] The prompt do not update when using set -gx change enviroment variable

[ekil1100]

Bug Report

Current Behavior

1. set a custom command

command = '''
if test "$OHOS_DEBUG" = "true"; 
    echo (basename $OHOS_PATH) "debug"; 
else; 
    echo (basename $OHOS_PATH) "release"; 
end
'''
when = "true"
format = "on [$symbol($output )]($style)"

2. run set -gx OHOS_DEBUG false
3. the prompt do not update to xxxxx release

Expected Behavior

the prompt should update to xxxxx release

Additional context/Screenshots

Possible Solution

Environment

• Starship version: starship 1.18.0
• Shell type: fish
• Shell version: fish, version 3.7.1
• Shell plugin manager: none
• Terminal emulator: windows terminal
• Operating system: Windows wsl ubuntu 22.04

Relevant Shell Configuration

set fish_greeting

set -U fish_user_paths $fish_user_paths /home/linuxbrew/.linuxbrew/bin
set -U fish_user_paths $fish_user_paths $HOME/chrome/depot_tools
set -U fish_user_paths $fish_user_paths $HOME/.local/bin
set -U fish_user_paths $fish_user_paths $HOME/ohos/tools
ark init fish | source

if status is-interactive
    export STARSHIP_LOG="error"
    starship init fish | source
    zoxide init --cmd j fish | source
end

ark init fish produce following config

set -gx OHOS_PATH "$HOME/ohos/standalone"
set -gx OHOS_STANDALONE true
set -gx OHOS_DEBUG true

function change_ohos_path
    set -gx OHOS_PATH "$HOME/ohos/$argv[1]"
    echo "OHOS_PATH: $OHOS_PATH"
end

function ohos
    if test $OHOS_STANDALONE = false
        set -gx OHOS_STANDALONE true
        change_ohos_path standalone
    else
        set -gx OHOS_STANDALONE false
        change_ohos_path main
    end
    echo "OHOS_STANDALONE: $OHOS_STANDALONE"
end

function debug
    if test $OHOS_DEBUG = false
        set -gx OHOS_DEBUG true
    else
        set -gx OHOS_DEBUG false
    end
    echo "OHOS_DEBUG: $OHOS_DEBUG"
end

Starship Configuration

# Set whatever time out in ms
command_timeout = 500

[custom.ohos]
command = '''
if test "$OHOS_DEBUG" = "true"; 
    echo (basename $OHOS_PATH) "debug"; 
else; 
    echo (basename $OHOS_PATH) "release"; 
end
'''
when = "true"
format = "on [$symbol($output )]($style)"

[character]
success_symbol = "[>](bold green)"
error_symbol = "[x](bold red)"
vimcmd_symbol = "[<](bold green)"

[git_commit]
tag_symbol = " tag "

[git_status]
ahead = ">"
behind = "<"
diverged = "<>"
renamed = "r"
deleted = "x"

[aws]
symbol = "aws "

[azure]
symbol = "az "

[bun]
symbol = "bun "

[c]
symbol = "C "

[cobol]
symbol = "cobol "

[conda]
symbol = "conda "

[crystal]
symbol = "cr "

[cmake]
symbol = "cmake "

[daml]
symbol = "daml "

[dart]
symbol = "dart "

[deno]
symbol = "deno "

[dotnet]
symbol = ".NET "

[directory]
truncation_length = 5
truncate_to_repo = false
read_only = " ro"

[docker_context]
symbol = "docker "

[elixir]
symbol = "exs "

[elm]
symbol = "elm "

[fennel]
symbol = "fnl "

[fossil_branch]
symbol = "fossil "

[gcloud]
symbol = "gcp "

[git_branch]
always_show_remote = true
format = "on [($remote_name/)$branch]($style) "

[golang]
symbol = "go "

[gradle]
symbol = "gradle "

[guix_shell]
symbol = "guix "

[hg_branch]
symbol = "hg "

[java]
symbol = "java "

[julia]
symbol = "jl "

[kotlin]
symbol = "kt "

[lua]
symbol = "lua "

[nodejs]
symbol = "nodejs "

[memory_usage]
symbol = "memory "

[meson]
symbol = "meson "

[nim]
symbol = "nim "

[nix_shell]
symbol = "nix "

[ocaml]
symbol = "ml "

[opa]
symbol = "opa "

[os.symbols]
Alpaquita = "alq "
Alpine = "alp "
Amazon = "amz "
Android = "andr "
Arch = "rch "
Artix = "atx "
CentOS = "cent "
Debian = "deb "
DragonFly = "dfbsd "
Emscripten = "emsc "
EndeavourOS = "ndev "
Fedora = "fed "
FreeBSD = "fbsd "
Garuda = "garu "
Gentoo = "gent "
HardenedBSD = "hbsd "
Illumos = "lum "
Linux = "lnx "
Mabox = "mbox "
Macos = "mac "
Manjaro = "mjo "
Mariner = "mrn "
MidnightBSD = "mid "
Mint = "mint "
NetBSD = "nbsd "
NixOS = "nix "
OpenBSD = "obsd "
OpenCloudOS = "ocos "
openEuler = "oeul "
openSUSE = "osuse "
OracleLinux = "orac "
Pop = "pop "
Raspbian = "rasp "
Redhat = "rhl "
RedHatEnterprise = "rhel "
Redox = "redox "
Solus = "sol "
SUSE = "suse "
Ubuntu = "ubnt "
Unknown = "unk "
Windows = "win "

[package]
symbol = "pkg "

[perl]
symbol = "pl "

[php]
symbol = "php "

[pijul_channel]
symbol = "pijul "

[pulumi]
symbol = "pulumi "

[purescript]
symbol = "purs "

[python]
symbol = "py "

[raku]
symbol = "raku "

[ruby]
symbol = "rb "

[rust]
symbol = "rs "

[scala]
symbol = "scala "

[spack]
symbol = "spack "

[solidity]
symbol = "solidity "

[status]
symbol = "[x](bold red) "

[sudo]
symbol = "sudo "

[swift]
symbol = "swift "

[terraform]
symbol = "terraform "

[zig]
symbol = "zig "

[ekil1100]

I digged in, find out the starship is running on a different fish shell instance. so the set -gx is not take effect.

Is there other way to achieving the same functionality or grep the right environment?

@andytom